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22 Cards in this Set

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What does the nucleus do?

The nucleus controls all the cell's activities

Not brain.

What occurs in the cytoplasm?

The cytoplasm is where chemical reactions take place.

What is the purpose of the cell membrane?

The cell membrane controls the movement of materials in and out of the cell.

What is mitochondria the site of?

Mitochondria is the site of respiration

What occurs in the ribosomes?

Ribosomes are where protein synthesis occurs

What is the purpose of a cell wall?

A cell wall supports a plant cell

What is a cell wall made from?

Cellulose

What is the purpose of chloroplasts?

This is the site of photosynthesis, where light energy is absorbed to make food.

What does the chloroplasts contain?

Chlorophyll

What is the point of a vacuole?

A vacuole stores sap.

List the cells features found in a plant cell only!

Cell Wall


Chloroplasts


Vacuole


Cytoplasm


Nucleus

How is DNA stored in a bacterial cell?

Bacterial cells do not have nuclei, which means that the DNA and genetic material float around in the cytoplasm.

What is the main difference to us between a bacteria and a bacterial colony.

We can see colonies with the naked eye, a single bacteria requires a microscope.

Why does a sperm cell contain so many mitochondria?

Sperms cells require alot of energy as they have to move.

What have gland cells specialised to do?

The have specialised with a lot of ribosomes to produce enzymes.

What does the root hair cell do to adapt to be the best for its use?

It has an increased surface area which means it can take in more water for the plant.

Provide the definition for diffusion

Diffusion is the movement of fluids from an area of high concentration to an area of low concentration. This is called moving down the concentration gradient.

Describe how molecules behave in fluids and suggest a reason why.

They move randomly because of the energy they have.

What is the net movement when it comes to cells?

The net movement is the overall number taken from an area of high concentration to an area of low concentration

In diffusion, what happens when the concentrations are very low and very high?

Diffusion happens quicker

What moves fluids down the concentration gradient?

Diffusion

List 3 examples of where diffusion takes place.

-oxygen into cells of the body from the bloodstream for respiration.


-carbon dioxide into photosynthesising plant cells.


-amino acids into the gut for digestion